fix(config): cache config and compiler correctly between runs (#2356)

Author: ahnpnl

src/ts-jest-transformer.spec.ts

@@ -31,14 +31,32 @@ beforeEach(() => {
 
 describe('TsJestTransformer', () => {
   describe('_configsFor', () => {
+    const obj1 = {
+      config: { cwd: process.cwd(), extensionsToTreatAsEsm: [], globals: {}, testMatch: [], testRegex: [] },
+      cacheFS: new Map(),
+    }
+
+    test('should cache necessary things', () => {
+      // @ts-expect-error testing purpose
+      new TsJestTransformer()._configsFor(obj1)
+
+      // @ts-expect-error testing purpose
+      expect(Object.keys(TsJestTransformer._cachedConfigSets[0])).toMatchInlineSnapshot(`
+Array [
+  "jestConfig",
+  "configSet",
+  "transformerCfgStr",
+  "compiler",
+  "depGraphs",
+  "tsResolvedModulesCachePath",
+]
+`)
+    })
+
     test(
       'should return the same config set for same values with different jest config objects' +
         ' but their serialized versions are the same',
       () => {
-        const obj1 = {
-          config: { cwd: process.cwd(), extensionsToTreatAsEsm: [], globals: {}, testMatch: [], testRegex: [] },
-          cacheFS: new Map(),
-        }
         const obj2 = { ...obj1, config: { ...obj1.config, globals: Object.create(null) } }
         // @ts-expect-error testing purpose
         const cs1 = new TsJestTransformer()._configsFor(obj1)
@@ -50,10 +68,6 @@ describe('TsJestTransformer', () => {
     )
 
     test('should return the same config set for same values with jest config objects', () => {
-      const obj1 = {
-        config: { cwd: process.cwd(), extensionsToTreatAsEsm: [], globals: {}, testMatch: [], testRegex: [] },
-        cacheFS: new Map(),
-      }
       const obj2 = { ...obj1 }
       // @ts-expect-error testing purpose
       const cs1 = new TsJestTransformer()._configsFor(obj1)

src/ts-jest-transformer.ts

@@ -23,6 +23,8 @@ interface CachedConfigSet {
   jestConfig: JsonableValue<ProjectConfigTsJest>
   transformerCfgStr: string
   compiler: TsJestCompiler
+  depGraphs: Map<string, DepGraphInfo>
+  tsResolvedModulesCachePath: string | undefined
 }
 
 interface TsJestHooksMap {
@@ -65,6 +67,8 @@ export class TsJestTransformer implements Transformer {
     if (ccs) {
       this._transformCfgStr = ccs.transformerCfgStr
       this._compiler = ccs.compiler
+      this._depGraphs = ccs.depGraphs
+      this._tsResolvedModulesCachePath = ccs.tsResolvedModulesCachePath
       configSet = ccs.configSet
     } else {
       // try to look-it up by stringified version
@@ -79,6 +83,8 @@ export class TsJestTransformer implements Transformer {
         serializedCcs.jestConfig.value = config
         this._transformCfgStr = serializedCcs.transformerCfgStr
         this._compiler = serializedCcs.compiler
+        this._depGraphs = serializedCcs.depGraphs
+        this._tsResolvedModulesCachePath = serializedCcs.tsResolvedModulesCachePath
         configSet = serializedCcs.configSet
       } else {
         // create the new record in the index
@@ -92,13 +98,15 @@ export class TsJestTransformer implements Transformer {
         jest.cacheDirectory = undefined as any
         this._transformCfgStr = `${new JsonableValue(jest).serialized}${configSet.cacheSuffix}`
         this._compiler = new TsJestCompiler(configSet, cacheFS)
+        this._getFsCachedResolvedModules(configSet)
         TsJestTransformer._cachedConfigSets.push({
           jestConfig: new JsonableValue(config),
           configSet,
           transformerCfgStr: this._transformCfgStr,
           compiler: this._compiler,
+          depGraphs: this._depGraphs,
+          tsResolvedModulesCachePath: this._tsResolvedModulesCachePath,
         })
-        this._getFsCachedResolvedModules(configSet)
       }
     }