feat: Adds threshold parsing from vitest config

src/index.ts

@@ -1,19 +1,18 @@
-import { markdownTable } from 'markdown-table';
-import { readFile } from 'node:fs/promises';
-import path from 'node:path';
 import { generateSummaryTableData } from './generateSummaryTableData.js';
-import { JsonSummary } from './types/JsonSummary';
-import * as core from '@actions/core';
+import path from 'node:path';
+import { parseJsonSummary } from './parseJsonSummary.js';
 import { writeSummaryToPR } from './writeSummaryToPR.js';
+import * as core from '@actions/core';
+import { parseThresholds } from './parseThresholds.js';
 
 const DEFAULT_SUMMARY_PATH = path.join('coverage', 'coverage-summary.json');
+const DEFAULT_VITEST_CONFIG_PATH = path.join('vitest.config.js');
 
 const run = async () => {
-  const jsonSummaryPath = path.resolve(process.cwd(), DEFAULT_SUMMARY_PATH);
-  const jsonSummaryRaw = await readFile(jsonSummaryPath);
-  const jsonSummary: JsonSummary = JSON.parse(jsonSummaryRaw.toString());
+  const jsonSummary = await parseJsonSummary(DEFAULT_SUMMARY_PATH);
+  const thresholds = await parseThresholds(DEFAULT_VITEST_CONFIG_PATH);
 
-  const tableData = generateSummaryTableData(jsonSummary);
+  const tableData = generateSummaryTableData(jsonSummary, thresholds);
 
   const summary = core.summary
     .addHeading('Coverage Summary')

src/parseJsonSummary.ts

@@ -0,0 +1,13 @@
+import { readFile } from 'node:fs/promises';
+import path from 'node:path';
+import { JsonSummary } from './types/JsonSummary';
+
+const parseJsonSummary = async (jsonSummaryPath: string): Promise<JsonSummary> => {
+  const resolvedJsonSummaryPath = path.resolve(process.cwd(), jsonSummaryPath);
+  const jsonSummaryRaw = await readFile(resolvedJsonSummaryPath);
+  return JSON.parse(jsonSummaryRaw.toString()) as JsonSummary;
+}
+
+export {
+  parseJsonSummary
+};

src/parseThresholds.test.ts

@@ -0,0 +1,34 @@
+import { describe, it, expect } from 'vitest';
+import path from 'path';
+import { parseThresholds } from './parseThresholds';
+
+// get current dir name in module environment by url
+const moduleDir = path.dirname(new URL(import.meta.url).pathname);
+
+describe('generateTableData', () => {
+  const mockConfigPath = path.resolve(moduleDir, '..', 'test', 'mockConfig');
+  const getConfig = (configName: string) => path.resolve(mockConfigPath, configName)
+
+  it('reads all the thresholds from the given configuration file.', async (): Promise<void> => {
+    const thresholds = await parseThresholds(getConfig('vitest.config.all.js'));
+
+    expect(thresholds).toEqual({
+      lines: 60,
+      branches: 70,
+      functions: 80,
+      statements: 90
+    });
+  });
+
+
+  it('sets thresholds to 100 if 100 property is true.', async (): Promise<void> => {
+    const thresholds = await parseThresholds(getConfig('vitest.config.100.js'));
+
+    expect(thresholds).toEqual({
+      lines: 100,
+      branches: 100,
+      functions: 100,
+      statements: 100 
+    });
+  });
+});

src/parseThresholds.ts

@@ -0,0 +1,36 @@
+import { readFile } from 'node:fs/promises';
+import path from 'node:path';
+import { Thresholds } from './types/Threshold';
+
+import { loadConfigFromFile, resolveConfig,  } from 'vite';
+
+const parseThresholds = async (vitestConfigPath: string): Promise<Thresholds> => {
+  const resolvedViteConfigPath = path.resolve(process.cwd(), vitestConfigPath);
+  const configObj = await loadConfigFromFile({command: 'build', mode: 'production' }, resolvedViteConfigPath);
+
+  if(!configObj) {
+    return {};
+  }
+
+  const config = configObj.config;
+
+  if(config.test?.coverage?.["100"]) {
+    return {
+      lines: 100,
+      branches: 100,
+      functions: 100,
+      statements: 100,
+    }
+  }
+
+  return {
+    lines: config.test?.coverage?.lines,
+    branches: config.test?.coverage?.branches,
+    functions: config.test?.coverage?.functions,
+    statements: config.test?.coverage?.statements,
+  }
+}
+
+export {
+  parseThresholds
+};

test/mockConfig/vitest.config.100.js

@@ -0,0 +1,13 @@
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+  test: {
+    coverage: {
+      all: true,
+      reporter: ['text', 'json-summary'],
+      include: ['src'],
+      exclude: ['src/types'],
+      "100": true
+    }
+  }
+});

test/mockConfig/vitest.config.all.js

@@ -0,0 +1,16 @@
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+  test: {
+    coverage: {
+      all: true,
+      reporter: ['text', 'json-summary'],
+      include: ['src'],
+      exclude: ['src/types'],
+      lines: 60,
+      branches: 70,
+      functions: 80,
+      statements: 90
+    }
+  }
+});

test/mockConfig/vitest.config.none.js

@@ -0,0 +1,4 @@
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+});