test(migrate): add provider switch test

src/packages/migrate/src/__tests__/MigrateDev.test.ts

@@ -630,11 +630,11 @@ describe('sqlite', () => {
 
     await expect(result).rejects.toMatchInlineSnapshot(`
 
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                ⚠️ We found changes that cannot be executed:
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            ⚠️ We found changes that cannot be executed:
 
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  • Step 0 Made the column \`fullname\` on table \`Blog\` required, but there are 1 existing NULL values.
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              • Step 0 Made the column \`fullname\` on table \`Blog\` required, but there are 1 existing NULL values.
 
-                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                `)
+                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          `)
     expect(ctx.mocked['console.info'].mock.calls.join('\n'))
       .toMatchInlineSnapshot(`
       Prisma schema loaded from prisma/schema.prisma
@@ -693,10 +693,10 @@ describe('sqlite', () => {
     expect(ctx.mocked['console.log'].mock.calls.join('\n'))
       .toMatchInlineSnapshot(`
 
-                                                                                                                                                                                                                              ⚠️  There will be data loss when applying the migration:
+                                                                                                                                                                                                                                    ⚠️  There will be data loss when applying the migration:
 
-                                                                                                                                                                                                                                • You are about to drop the \`Blog\` table, which is not empty (2 rows).
-                                                                                                                                                    `)
+                                                                                                                                                                                                                                      • You are about to drop the \`Blog\` table, which is not empty (2 rows).
+                                                                                                                                                        `)
     expect(ctx.mocked['console.error'].mock.calls).toMatchSnapshot()
   })
 
@@ -717,10 +717,10 @@ describe('sqlite', () => {
     expect(ctx.mocked['console.log'].mock.calls.join('\n'))
       .toMatchInlineSnapshot(`
 
-                                                                                                                                                                                                                              ⚠️  There will be data loss when applying the migration:
+                                                                                                                                                                                                                                    ⚠️  There will be data loss when applying the migration:
 
-                                                                                                                                                                                                                                • You are about to drop the \`Blog\` table, which is not empty (2 rows).
-                                                                                                                                                    `)
+                                                                                                                                                                                                                                      • You are about to drop the \`Blog\` table, which is not empty (2 rows).
+                                                                                                                                                        `)
     expect(ctx.mocked['console.error'].mock.calls).toMatchSnapshot()
   })
 
@@ -879,6 +879,29 @@ describe('sqlite', () => {
       This command only supports one seed file: Use \`seed.ts\`, \`.js\`, \`.sh\` or \`.go\`.
     `)
   })
+
+  it('provider switch: postgresql to sqlite', async () => {
+    ctx.fixture('provider-switch-postgresql-to-sqlite')
+
+    try {
+      await MigrateDev.new().parse(['--preview-feature'])
+    } catch (e) {
+      expect(e.code).toEqual('P3014')
+      expect(e.message).toContain('P3014')
+      expect(e.message).toContain('The datasource provider')
+    }
+
+    expect(ctx.mocked['console.info'].mock.calls.join('\n'))
+      .toMatchInlineSnapshot(`
+      Prisma schema loaded from prisma/schema.prisma
+      Datasource "my_db": SQLite database "dev.db" at "file:./dev.db"
+
+      SQLite database dev.db created at file:./dev.db
+
+    `)
+    expect(ctx.mocked['console.log'].mock.calls).toMatchSnapshot()
+    expect(ctx.mocked['console.error'].mock.calls).toMatchSnapshot()
+  })
 })
 
 describe('postgresql', () => {

src/packages/migrate/src/__tests__/__snapshots__/MigrateDev.test.ts.snap

@@ -104,6 +104,10 @@ exports[`sqlite one seed file 4`] = ``;
 
 exports[`sqlite provider array should fail 3`] = `Array []`;
 
+exports[`sqlite provider switch: postgresql to sqlite 2`] = `Array []`;
+
+exports[`sqlite provider switch: postgresql to sqlite 3`] = `Array []`;
+
 exports[`sqlite removed applied migration and unapplied empty draft 3`] = ``;
 
 exports[`sqlite removed applied migration and unapplied empty draft 4`] = ``;

src/packages/migrate/src/__tests__/fixtures/provider-switch-postgresql-to-sqlite/prisma/migrations/20210215145936_hello/migration.sql

@@ -0,0 +1 @@
+-- CreateTable

src/packages/migrate/src/__tests__/fixtures/transition-db-push-migrate/prisma/migrations/migration_lock.toml → src/packages/migrate/src/__tests__/fixtures/provider-switch-postgresql-to-sqlite/prisma/migrations/migration_lock.toml

@@ -1,2 +1,2 @@
 # Please do not edit this file manually
-provider = "sqlite"
+provider = "postgresql"

src/packages/migrate/src/__tests__/fixtures/provider-switch-postgresql-to-sqlite/prisma/schema.prisma

@@ -0,0 +1,19 @@
+// datasource my_db {
+//   provider = "postgresql"
+//   url      = env("TEST_POSTGRES_URI_MIGRATE")
+// }
+
+datasource my_db {
+  provider = "sqlite"
+  url      = "file:./dev.db"
+}
+
+generator client {
+  provider = "prisma-client-js"
+  output   = "@prisma/client"
+}
+
+model Blog {
+  id          Int @id
+  viewCount20 Int
+}