add specs

packages/size-limit/test/__snapshots__/run.test.js.snap

@@ -202,18 +202,26 @@ Check out docs for more complicated cases
 "
 `;
 
-exports[`shows migration guide for npm users, because of yarn 2 1`] = `
-" WARN  You need to add size-limit dependency
-       In order for the plugins to work correctly
-       npm install --save-dev size-limit
+exports[`shows migration guide for npm users: config 1, dep 0 1`] = `
+"Install Size Limit preset depends on type of the project
+
+For application, where you send JS bundle directly to users
+  npm install --save-dev @size-limit/preset-app
+For frameworks, components and big libraries
+  npm install --save-dev @size-limit/preset-big-lib
+For small (< 10 KB) libraries
+  npm install --save-dev @size-limit/preset-small-lib
+Check out docs for more complicated cases
+  https://github.com/ai/size-limit/
 
+You need to add size-limit dependency: npm install --save-dev size-limit
 "
 `;
 
-exports[`shows migration guide for yarn 2 users 1`] = `
+exports[`shows migration guide for npm users: without sl dev dep 1`] = `
 " WARN  You need to add size-limit dependency
        In order for the plugins to work correctly
-       [33myarn add --dev size-limit[39m
+       [33mnpm install --save-dev size-limit[39m
 
 "
 `;
@@ -232,6 +240,30 @@ Check out docs for more complicated cases
 "
 `;
 
+exports[`shows migration guide for yarn users: config 1, dep 0 1`] = `
+"Install Size Limit preset depends on type of the project
+
+For application, where you send JS bundle directly to users
+  yarn add --dev @size-limit/preset-app
+For frameworks, components and big libraries
+  yarn add --dev @size-limit/preset-big-lib
+For small (< 10 KB) libraries
+  yarn add --dev @size-limit/preset-small-lib
+Check out docs for more complicated cases
+  https://github.com/ai/size-limit/
+
+You need to add size-limit dependency: yarn add --dev size-limit
+"
+`;
+
+exports[`shows migration guide for yarn users: without sl dev dep 1`] = `
+" WARN  You need to add size-limit dependency
+       In order for the plugins to work correctly
+       yarn add --dev size-limit
+
+"
+`;
+
 exports[`shows size-limit dependency warning 1`] = `""`;
 
 exports[`shows webpack-related help 1`] = `

packages/size-limit/test/fixtures/npm-with-config-without-dev/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "file",
+  "private": true,
+  "devDependencies": {},
+  "size-limit": [
+    {
+      "path": "index.js",
+      "limit": "1 KB",
+      "running": false
+    }
+  ]
+}

packages/size-limit/test/fixtures/yarn-with-config-without-dev/package.json

@@ -0,0 +1,12 @@
+{
+  "name": "file",
+  "private": true,
+  "devDependencies": {},
+  "size-limit": [
+    {
+      "path": "index.js",
+      "limit": "1 KB",
+      "running": false
+    }
+  ]
+}

packages/size-limit/test/run.test.js

@@ -114,14 +114,28 @@ it('shows migration guide for yarn users', async () => {
   expect(await error('legacy-yarn')).toMatchSnapshot()
 })
 
-it('shows migration guide for yarn 2 users', async () => {
+it('shows migration guide for yarn users: without sl dev dep', async () => {
   let [process, history] = createProcess('yarn-without-dev-dep')
   await run(process)
   expect(history.exitCode).toEqual(0)
   expect(history.stderr).toMatchSnapshot()
 })
 
-it('shows migration guide for npm users, because of yarn 2', async () => {
+it('shows migration guide for yarn users: config 1, dep 0', async () => {
+  let [process, history] = createProcess('yarn-with-config-without-dev')
+  await run(process)
+  expect(history.exitCode).toEqual(1)
+  expect(history.stderr).toMatchSnapshot()
+})
+
+it('shows migration guide for npm users: config 1, dep 0', async () => {
+  let [process, history] = createProcess('npm-with-config-without-dev')
+  await run(process)
+  expect(history.exitCode).toEqual(1)
+  expect(history.stderr).toMatchSnapshot()
+})
+
+it('shows migration guide for npm users: without sl dev dep', async () => {
   let [process, history] = createProcess('npm-without-dev-dep')
   await run(process)
   expect(history.exitCode).toEqual(0)