From 7ebcb500148cc8c774b96b69032bdb01daaba870 Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Sat, 13 Feb 2021 16:04:12 +0100
Subject: [PATCH 01/11] Consider specifiers for equality operator to pin a
 dependency in make_install_requirement

- Changed function signature to take ireq directly rather than passing its
members one by one
- Changed type hint for version as I was getting a pip Version rather than
a string, maybe there are some parts of the code calling with string though
- Can confirm it generates a pinned torch with === in my use case as
expected
---
 piptools/repositories/local.py |  2 +-
 piptools/repositories/pypi.py  |  3 +--
 piptools/utils.py              | 13 +++++++++++--
 tests/conftest.py              |  2 +-
 4 files changed, 14 insertions(+), 6 deletions(-)

diff --git a/piptools/repositories/local.py b/piptools/repositories/local.py
index e2a96be4d..bc9851656 100644
--- a/piptools/repositories/local.py
+++ b/piptools/repositories/local.py
@@ -64,7 +64,7 @@ def find_best_match(self, ireq, prereleases=None):
         if existing_pin and ireq_satisfied_by_existing_pin(ireq, existing_pin):
             project, version, _ = as_tuple(existing_pin)
             return make_install_requirement(
-                project, version, ireq.extras, constraint=ireq.constraint
+                project, version, ireq
             )
         else:
             return self.repository.find_best_match(ireq, prereleases)
diff --git a/piptools/repositories/pypi.py b/piptools/repositories/pypi.py
index 433187dda..d64f48027 100644
--- a/piptools/repositories/pypi.py
+++ b/piptools/repositories/pypi.py
@@ -159,8 +159,7 @@ def find_best_match(self, ireq, prereleases=None):
         return make_install_requirement(
             best_candidate.name,
             best_candidate.version,
-            ireq.extras,
-            constraint=ireq.constraint,
+            ireq,
         )
 
     def resolve_reqs(self, download_dir, ireq, wheel_cache):
diff --git a/piptools/utils.py b/piptools/utils.py
index 5ed2c38b9..3bea0be1e 100644
--- a/piptools/utils.py
+++ b/piptools/utils.py
@@ -21,6 +21,7 @@
 from pip._internal.vcs import is_url
 from pip._vendor.packaging.markers import Marker
 from pip._vendor.packaging.specifiers import SpecifierSet
+from pip._vendor.packaging.version import Version
 
 _KT = TypeVar("_KT")
 _VT = TypeVar("_VT")
@@ -66,16 +67,24 @@ def comment(text: str) -> str:
 
 
 def make_install_requirement(
-    name: str, version: str, extras: Iterable[str], constraint: bool = False
+    name: str, version: Version, ireq: InstallRequirement
 ) -> InstallRequirement:
     # If no extras are specified, the extras string is blank
     extras_string = ""
+    extras = ireq.extras
     if extras:
         # Sort extras for stability
         extras_string = f"[{','.join(sorted(extras))}]"
 
+    version_specifier = "=="
+    for specifier in ireq.specifier:
+        specifier_version = Version(specifier.version)
+        if specifier.operator == "===" and specifier_version == version:
+            version_specifier = "==="
+            break
+
     return install_req_from_line(
-        str(f"{name}{extras_string}=={version}"), constraint=constraint
+        str(f"{name}{extras_string}{version_specifier}{version}"), constraint=ireq.constraint
     )
 
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 0936845ed..4a7d2b36d 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -69,7 +69,7 @@ def find_best_match(self, ireq, prereleases=False):
             raise NoCandidateFound(ireq, tried_versions, ["https://fake.url.foo"])
         best_version = max(versions, key=Version)
         return make_install_requirement(
-            key_from_ireq(ireq), best_version, ireq.extras, constraint=ireq.constraint
+            key_from_ireq(ireq), best_version, ireq
         )
 
     def get_dependencies(self, ireq):

From 37c84a7550c5ba41c5591c009b95768f2f88cd73 Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Sat, 13 Feb 2021 16:29:54 +0100
Subject: [PATCH 02/11] Apply tox -e checkqa

---
 piptools/repositories/local.py | 4 +---
 piptools/utils.py              | 3 ++-
 tests/conftest.py              | 4 +---
 3 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/piptools/repositories/local.py b/piptools/repositories/local.py
index bc9851656..4cb04178b 100644
--- a/piptools/repositories/local.py
+++ b/piptools/repositories/local.py
@@ -63,9 +63,7 @@ def find_best_match(self, ireq, prereleases=None):
         existing_pin = self.existing_pins.get(key)
         if existing_pin and ireq_satisfied_by_existing_pin(ireq, existing_pin):
             project, version, _ = as_tuple(existing_pin)
-            return make_install_requirement(
-                project, version, ireq
-            )
+            return make_install_requirement(project, version, ireq)
         else:
             return self.repository.find_best_match(ireq, prereleases)
 
diff --git a/piptools/utils.py b/piptools/utils.py
index 3bea0be1e..c3af5de7c 100644
--- a/piptools/utils.py
+++ b/piptools/utils.py
@@ -84,7 +84,8 @@ def make_install_requirement(
             break
 
     return install_req_from_line(
-        str(f"{name}{extras_string}{version_specifier}{version}"), constraint=ireq.constraint
+        str(f"{name}{extras_string}{version_specifier}{version}"),
+        constraint=ireq.constraint,
     )
 
 
diff --git a/tests/conftest.py b/tests/conftest.py
index 4a7d2b36d..c7021951c 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -68,9 +68,7 @@ def find_best_match(self, ireq, prereleases=False):
             ]
             raise NoCandidateFound(ireq, tried_versions, ["https://fake.url.foo"])
         best_version = max(versions, key=Version)
-        return make_install_requirement(
-            key_from_ireq(ireq), best_version, ireq
-        )
+        return make_install_requirement(key_from_ireq(ireq), best_version, ireq)
 
     def get_dependencies(self, ireq):
         if ireq.editable or is_url_requirement(ireq):

From 6a3b232ee34bd251456261ed6f8e1af3b29a1fc0 Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Sat, 13 Feb 2021 16:47:29 +0100
Subject: [PATCH 03/11] Prefer forcing version to string rather than building a
 Version object from a specifier version as it made tests fail

---
 piptools/utils.py | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/piptools/utils.py b/piptools/utils.py
index c3af5de7c..af011ced3 100644
--- a/piptools/utils.py
+++ b/piptools/utils.py
@@ -67,7 +67,7 @@ def comment(text: str) -> str:
 
 
 def make_install_requirement(
-    name: str, version: Version, ireq: InstallRequirement
+    name: str, version: Union[str, Version], ireq: InstallRequirement
 ) -> InstallRequirement:
     # If no extras are specified, the extras string is blank
     extras_string = ""
@@ -78,8 +78,7 @@ def make_install_requirement(
 
     version_specifier = "=="
     for specifier in ireq.specifier:
-        specifier_version = Version(specifier.version)
-        if specifier.operator == "===" and specifier_version == version:
+        if specifier.operator == "===" and specifier.version == str(version):
             version_specifier = "==="
             break
 

From 12dace5f7f4af2272ef1faa68dd61a3d6831a88e Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Sun, 14 Feb 2021 10:18:56 +0100
Subject: [PATCH 04/11] Rename variables to have clearer names

---
 piptools/utils.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/piptools/utils.py b/piptools/utils.py
index af011ced3..cde26a5e1 100644
--- a/piptools/utils.py
+++ b/piptools/utils.py
@@ -76,14 +76,15 @@ def make_install_requirement(
         # Sort extras for stability
         extras_string = f"[{','.join(sorted(extras))}]"
 
-    version_specifier = "=="
+    version_pin_operator = "=="
+    version_as_str = str(version)
     for specifier in ireq.specifier:
-        if specifier.operator == "===" and specifier.version == str(version):
-            version_specifier = "==="
+        if specifier.operator == "===" and specifier.version == version_as_str:
+            version_pin_operator = "==="
             break
 
     return install_req_from_line(
-        str(f"{name}{extras_string}{version_specifier}{version}"),
+        str(f"{name}{extras_string}{version_pin_operator}{version}"),
         constraint=ireq.constraint,
     )
 

From eface673f0a85412d1a5b7f9d169928279ade875 Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Sun, 14 Feb 2021 10:21:06 +0100
Subject: [PATCH 05/11] Write test for requirements pinned with === and
 multiple pin sources

- Use case example where torch has multiple pin sources
---
 tests/test_cli_compile.py | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 603d3f83f..158898950 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -1555,3 +1555,27 @@ def test_duplicate_reqs_combined(
     assert out.exit_code == 0, out
     assert str(test_package_2) in out.stderr
     assert "test-package-1==0.1" in out.stderr
+
+
+@pytest.mark.network
+def test_triple_equal_pinned_depency_is_used(runner):
+    """
+    Test that pip-compile properly emits the pinned requirement with ===
+    torchvision 0.8.2 requires torch==1.7.1 which can resolve to versions with
+    patches (e.g. torch 1.7.1+cu110), we want torch===1.7.1 without patches
+    """
+    with open("requirements.in", "w") as reqs_in:
+        reqs_in.write("torch===1.7.1\n")
+        reqs_in.write("torchvision===0.8.2\n")
+
+    out = runner.invoke(
+        cli,
+        [
+            "--find-links",
+            "https://download.pytorch.org/whl/torch_stable.html",
+        ],
+    )
+
+    assert out.exit_code == 0, out
+    assert "torch===1.7.1" in out.stderr
+    assert "torchvision===0.8.2" in out.stderr

From 37029fd955f3c873d342526f00abd25e891fbe0b Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Sun, 14 Feb 2021 11:16:46 +0100
Subject: [PATCH 06/11] Use fake test packages which demonstrates the torch
 use-case

---
 tests/test_cli_compile.py | 29 +++++++++++++++++------------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 158898950..25d8fa4a3 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -1558,24 +1558,29 @@ def test_duplicate_reqs_combined(
 
 
 @pytest.mark.network
-def test_triple_equal_pinned_depency_is_used(runner):
+def test_triple_equal_pinned_depency_is_used(runner, make_package, make_wheel, tmpdir):
     """
     Test that pip-compile properly emits the pinned requirement with ===
     torchvision 0.8.2 requires torch==1.7.1 which can resolve to versions with
     patches (e.g. torch 1.7.1+cu110), we want torch===1.7.1 without patches
     """
-    with open("requirements.in", "w") as reqs_in:
-        reqs_in.write("torch===1.7.1\n")
-        reqs_in.write("torchvision===0.8.2\n")
 
-    out = runner.invoke(
-        cli,
-        [
-            "--find-links",
-            "https://download.pytorch.org/whl/torch_stable.html",
-        ],
+    dists_dir = tmpdir / "dists"
+
+    test_package_1 = make_package("test_package_1", version="1.7.1")
+    make_wheel(test_package_1, dists_dir)
+
+    test_package_2 = make_package(
+        "test_package_2", version="0.8.2", install_requires=["test-package-1==1.7.1"]
     )
+    make_wheel(test_package_2, dists_dir)
+
+    with open("requirements.in", "w") as reqs_in:
+        reqs_in.write("test-package-1===1.7.1\n")
+        reqs_in.write("test-package-2===0.8.2\n")
+
+    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
 
     assert out.exit_code == 0, out
-    assert "torch===1.7.1" in out.stderr
-    assert "torchvision===0.8.2" in out.stderr
+    assert "test-package-1===1.7.1" in out.stderr
+    assert "test-package-2===0.8.2" in out.stderr

From 27119409e226537454c3bd564fb432cf67e5d9c5 Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Sun, 14 Feb 2021 11:25:54 +0100
Subject: [PATCH 07/11] Network is not required by the test anymore, remove it

---
 tests/test_cli_compile.py | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 25d8fa4a3..a619ae89a 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -1557,7 +1557,6 @@ def test_duplicate_reqs_combined(
     assert "test-package-1==0.1" in out.stderr
 
 
-@pytest.mark.network
 def test_triple_equal_pinned_depency_is_used(runner, make_package, make_wheel, tmpdir):
     """
     Test that pip-compile properly emits the pinned requirement with ===

From 04154d2c5516d4b457fdd2580903db17bf13b4cd Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Mon, 15 Feb 2021 09:23:45 +0100
Subject: [PATCH 08/11] Pin test_package_2 with == operator

---
 tests/test_cli_compile.py | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index a619ae89a..9b59d710a 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -1557,7 +1557,9 @@ def test_duplicate_reqs_combined(
     assert "test-package-1==0.1" in out.stderr
 
 
-def test_triple_equal_pinned_depency_is_used(runner, make_package, make_wheel, tmpdir):
+def test_triple_equal_pinned_dependency_is_used(
+    runner, make_package, make_wheel, tmpdir
+):
     """
     Test that pip-compile properly emits the pinned requirement with ===
     torchvision 0.8.2 requires torch==1.7.1 which can resolve to versions with
@@ -1576,10 +1578,10 @@ def test_triple_equal_pinned_depency_is_used(runner, make_package, make_wheel, t
 
     with open("requirements.in", "w") as reqs_in:
         reqs_in.write("test-package-1===1.7.1\n")
-        reqs_in.write("test-package-2===0.8.2\n")
+        reqs_in.write("test-package-2==0.8.2\n")
 
     out = runner.invoke(cli, ["--find-links", str(dists_dir)])
 
     assert out.exit_code == 0, out
     assert "test-package-1===1.7.1" in out.stderr
-    assert "test-package-2===0.8.2" in out.stderr
+    assert "test-package-2==0.8.2" in out.stderr

From f77201c09a3ed1e58c2fca3af727e10a009267ae Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Mon, 15 Feb 2021 10:28:30 +0100
Subject: [PATCH 09/11] Add test cases to check different combinations of pins

---
 tests/test_cli_compile.py | 43 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 9b59d710a..4c52d2b67 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -1576,6 +1576,26 @@ def test_triple_equal_pinned_dependency_is_used(
     )
     make_wheel(test_package_2, dists_dir)
 
+    # Case 1 ===
+    with open("requirements.in", "w") as reqs_in:
+        reqs_in.write("test-package-1===1.7.1\n")
+
+    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
+
+    assert out.exit_code == 0, out
+    assert "test-package-1===1.7.1" in out.stderr
+
+    # Case 2 ==
+    with open("requirements.in", "w") as reqs_in:
+        reqs_in.write("test-package-1==1.7.1\n")
+
+    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
+
+    assert out.exit_code == 0, out
+    assert "test-package-1==1.7.1" in out.stderr
+
+    # Case 3 test_package_1 pinned by user with ===
+    # but pinned by package with ==, prefer ===
     with open("requirements.in", "w") as reqs_in:
         reqs_in.write("test-package-1===1.7.1\n")
         reqs_in.write("test-package-2==0.8.2\n")
@@ -1585,3 +1605,26 @@ def test_triple_equal_pinned_dependency_is_used(
     assert out.exit_code == 0, out
     assert "test-package-1===1.7.1" in out.stderr
     assert "test-package-2==0.8.2" in out.stderr
+
+    # Case 4 test_package_1 pinned by user with ===
+    # but pinned by package with ==, prefer ===
+    # Different pin for test_package_2
+    with open("requirements.in", "w") as reqs_in:
+        reqs_in.write("test-package-1===1.7.1\n")
+        reqs_in.write("test-package-2===0.8.2\n")
+
+    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
+
+    assert out.exit_code == 0, out
+    assert "test-package-1===1.7.1" in out.stderr
+    assert "test-package-2===0.8.2" in out.stderr
+
+    # Case 5 only package 2 pinned with ===
+    with open("requirements.in", "w") as reqs_in:
+        reqs_in.write("test-package-2===0.8.2\n")
+
+    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
+
+    assert out.exit_code == 0, out
+    assert "test-package-1==1.7.1" in out.stderr
+    assert "test-package-2===0.8.2" in out.stderr

From dfb28ac38c14c1e97458f354e139600cefcb7c81 Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Fri, 19 Feb 2021 20:39:40 +0100
Subject: [PATCH 10/11] Parametrize test, use simple versions

---
 tests/test_cli_compile.py | 93 ++++++++++++++++++---------------------
 1 file changed, 43 insertions(+), 50 deletions(-)

diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 4c52d2b67..96eaaf635 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -1557,8 +1557,44 @@ def test_duplicate_reqs_combined(
     assert "test-package-1==0.1" in out.stderr
 
 
+@pytest.mark.parametrize(
+    ("pkg2_install_requires", "req_in_content", "out_expected_content"),
+    (
+        pytest.param(
+            "",
+            ["test-package-1===0.1.0\n"],
+            ["test-package-1===0.1.0"],
+        ),
+        pytest.param(
+            "",
+            ["test-package-1==0.1.0\n"],
+            ["test-package-1==0.1.0"],
+        ),
+        pytest.param(
+            "test-package-1==0.1.0",
+            ["test-package-1===0.1.0\n", "test-package-2==0.1.0\n"],
+            ["test-package-1===0.1.0", "test-package-2==0.1.0"],
+        ),
+        pytest.param(
+            "test-package-1==0.1.0",
+            ["test-package-1===0.1.0\n", "test-package-2===0.1.0\n"],
+            ["test-package-1===0.1.0", "test-package-2===0.1.0"],
+        ),
+        pytest.param(
+            "test-package-1==0.1.0",
+            ["test-package-2===0.1.0\n"],
+            ["test-package-1==0.1.0", "test-package-2===0.1.0"],
+        ),
+    ),
+)
 def test_triple_equal_pinned_dependency_is_used(
-    runner, make_package, make_wheel, tmpdir
+    runner,
+    make_package,
+    make_wheel,
+    tmpdir,
+    pkg2_install_requires,
+    req_in_content,
+    out_expected_content,
 ):
     """
     Test that pip-compile properly emits the pinned requirement with ===
@@ -1568,63 +1604,20 @@ def test_triple_equal_pinned_dependency_is_used(
 
     dists_dir = tmpdir / "dists"
 
-    test_package_1 = make_package("test_package_1", version="1.7.1")
+    test_package_1 = make_package("test_package_1", version="0.1.0")
     make_wheel(test_package_1, dists_dir)
 
     test_package_2 = make_package(
-        "test_package_2", version="0.8.2", install_requires=["test-package-1==1.7.1"]
+        "test_package_2", version="0.1.0", install_requires=[pkg2_install_requires]
     )
     make_wheel(test_package_2, dists_dir)
 
-    # Case 1 ===
-    with open("requirements.in", "w") as reqs_in:
-        reqs_in.write("test-package-1===1.7.1\n")
-
-    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
-
-    assert out.exit_code == 0, out
-    assert "test-package-1===1.7.1" in out.stderr
-
-    # Case 2 ==
-    with open("requirements.in", "w") as reqs_in:
-        reqs_in.write("test-package-1==1.7.1\n")
-
-    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
-
-    assert out.exit_code == 0, out
-    assert "test-package-1==1.7.1" in out.stderr
-
-    # Case 3 test_package_1 pinned by user with ===
-    # but pinned by package with ==, prefer ===
-    with open("requirements.in", "w") as reqs_in:
-        reqs_in.write("test-package-1===1.7.1\n")
-        reqs_in.write("test-package-2==0.8.2\n")
-
-    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
-
-    assert out.exit_code == 0, out
-    assert "test-package-1===1.7.1" in out.stderr
-    assert "test-package-2==0.8.2" in out.stderr
-
-    # Case 4 test_package_1 pinned by user with ===
-    # but pinned by package with ==, prefer ===
-    # Different pin for test_package_2
-    with open("requirements.in", "w") as reqs_in:
-        reqs_in.write("test-package-1===1.7.1\n")
-        reqs_in.write("test-package-2===0.8.2\n")
-
-    out = runner.invoke(cli, ["--find-links", str(dists_dir)])
-
-    assert out.exit_code == 0, out
-    assert "test-package-1===1.7.1" in out.stderr
-    assert "test-package-2===0.8.2" in out.stderr
-
-    # Case 5 only package 2 pinned with ===
     with open("requirements.in", "w") as reqs_in:
-        reqs_in.write("test-package-2===0.8.2\n")
+        for line in req_in_content:
+            reqs_in.write(line)
 
     out = runner.invoke(cli, ["--find-links", str(dists_dir)])
 
     assert out.exit_code == 0, out
-    assert "test-package-1==1.7.1" in out.stderr
-    assert "test-package-2===0.8.2" in out.stderr
+    for line in out_expected_content:
+        assert line in out.stderr

From 83382722f8e06e55f267e39bc4863c3e3aafbe0e Mon Sep 17 00:00:00 2001
From: IceTDrinker <49040125+IceTDrinker@users.noreply.github.com>
Date: Wed, 24 Feb 2021 09:38:59 +0100
Subject: [PATCH 11/11] Add test ids

---
 tests/test_cli_compile.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/test_cli_compile.py b/tests/test_cli_compile.py
index 96eaaf635..5f50a27aa 100644
--- a/tests/test_cli_compile.py
+++ b/tests/test_cli_compile.py
@@ -1564,26 +1564,31 @@ def test_duplicate_reqs_combined(
             "",
             ["test-package-1===0.1.0\n"],
             ["test-package-1===0.1.0"],
+            id="pin package with ===",
         ),
         pytest.param(
             "",
             ["test-package-1==0.1.0\n"],
             ["test-package-1==0.1.0"],
+            id="pin package with ==",
         ),
         pytest.param(
             "test-package-1==0.1.0",
             ["test-package-1===0.1.0\n", "test-package-2==0.1.0\n"],
             ["test-package-1===0.1.0", "test-package-2==0.1.0"],
+            id="dep === pin preferred over == pin, main package == pin",
         ),
         pytest.param(
             "test-package-1==0.1.0",
             ["test-package-1===0.1.0\n", "test-package-2===0.1.0\n"],
             ["test-package-1===0.1.0", "test-package-2===0.1.0"],
+            id="dep === pin preferred over == pin, main package === pin",
         ),
         pytest.param(
             "test-package-1==0.1.0",
             ["test-package-2===0.1.0\n"],
             ["test-package-1==0.1.0", "test-package-2===0.1.0"],
+            id="dep == pin conserved, main package === pin",
         ),
     ),
 )