Add support for fromJSONFile to skip test execution and process JSON file (#11)

Co-authored-by: josh@careerpuck.com <Joshua Krall>

Author: jkrall

action.yml

@@ -20,6 +20,9 @@ inputs:
     description: 'Omit the pie chart from the summary output'
     required: false
     default: 'false'
+  fromJSONFile:
+    description: 'Parse the specified JSON file, instead of executing go test'
+    required: false
 runs:
   using: 'node20'
   main: 'dist/index.js'

src/runner.ts

@@ -13,6 +13,7 @@ class Runner {
   testArguments = ['./...']
   omitUntestedPackages = false
   omitPie = false
+  fromJSONFile: string | null = null
 
   constructor() {
     this.getInputs()
@@ -24,24 +25,41 @@ class Runner {
   async run() {
     const moduleName = await this.findModuleName()
 
-    const { retCode, stdout, stderr } = await this.goTest()
-    if (retCode > 0) {
-      core.error(`\`go test\` returned nonzero exit code: ${retCode}`)
-    }
-
-    const testEvents = parseTestEvents(stdout)
-
-    const renderer = new Renderer(
-      moduleName,
-      testEvents,
-      stderr,
-      this.omitUntestedPackages,
-      this.omitPie
-    )
-
-    await renderer.writeSummary()
+    if (this.fromJSONFile) {
+      const stdout = await readFile(this.fromJSONFile)
+      const testEvents = parseTestEvents(stdout.toString())
+
+      const renderer = new Renderer(
+        moduleName,
+        testEvents,
+        '',
+        this.omitUntestedPackages,
+        this.omitPie
+      )
+  
+      await renderer.writeSummary()
+  
+      process.exit(0)
+    } else {
+      const { retCode, stdout, stderr } = await this.goTest()
+      if (retCode > 0) {
+        core.error(`\`go test\` returned nonzero exit code: ${retCode}`)
+      }
 
-    process.exit(retCode)
+      const testEvents = parseTestEvents(stdout)
+
+      const renderer = new Renderer(
+        moduleName,
+        testEvents,
+        stderr,
+        this.omitUntestedPackages,
+        this.omitPie
+      )
+  
+      await renderer.writeSummary()
+  
+      process.exit(retCode)
+    }
   }
 
   /**
@@ -125,6 +143,11 @@ class Runner {
     if (omitPie) {
       this.omitPie = core.getBooleanInput('omitPie')
     }
+
+    const fromJSONFile = core.getInput('fromJSONFile')
+    if (fromJSONFile) {
+      this.fromJSONFile = fromJSONFile
+    }
   }
 }