From 7eca52154d0ef073dbdd4634a8d60d64b40cf1fc Mon Sep 17 00:00:00 2001
From: yogyagamage <47789154+yogyagamage@users.noreply.github.com>
Date: Wed, 11 Sep 2024 21:50:17 -0400
Subject: [PATCH] Add github action to run tests and get coverages

---
 .github/workflows/test.yml | 38 ++++++++++++++++++++++++++++++
 config/coverage.py         | 47 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 85 insertions(+)
 create mode 100644 .github/workflows/test.yml
 create mode 100644 config/coverage.py

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 000000000..1817a817c
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,38 @@
+name: Java CI with Maven
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-java@v4.2.1
+      with:
+        distribution: 'temurin'
+        java-version: '17'
+        cache: 'maven'
+
+    - name: Build and Test with Maven
+      timeout-minutes: 15
+      run: ./mvnw -B verify
+
+    - name: Get JaCoCo Coverage
+      id: coverage  
+      run: |
+        coverage=$(python3 config/coverage.py target/site/jacoco/jacoco.csv) 
+        echo "COVERAGE=$coverage" >> $GITHUB_ENV
+
+    - name: Fail if coverage has not improved.
+      run: |
+        coverage=$COVERAGE
+        threshold=24.46
+        if (( $(echo "$coverage <= $threshold" | bc -l) )); then
+          echo "Coverage is not improved."
+          exit 1
+        else
+          echo "New coverage: $coverage%. Coverage is improved!"
+        fi
diff --git a/config/coverage.py b/config/coverage.py
new file mode 100644
index 000000000..7b86c7eaa
--- /dev/null
+++ b/config/coverage.py
@@ -0,0 +1,47 @@
+import csv
+
+def computeCoverage(fileList):
+    """Parses one or more jacoco.csv files and computes code coverage percentages."""
+    missed = 0
+    covered = 0
+    missedBranches = 0
+    coveredBranches = 0
+    
+    for filename in fileList:
+        try:
+            with open(filename, newline='') as csvfile:
+                jacocoReader = csv.reader(csvfile)
+                for i, row in enumerate(jacocoReader):
+                    if i > 0:  # Skip header
+                        missed += int(row[3])
+                        covered += int(row[4])
+                        missedBranches += int(row[5])
+                        coveredBranches += int(row[6])
+        except FileNotFoundError:
+            print(f"File not found: {filename}")
+            return (0, 0)
+        except Exception as e:
+            print(f"Error processing file {filename}: {str(e)}")
+            return (0, 0)
+    
+    return (
+        calculatePercentage(covered, missed),
+        calculatePercentage(coveredBranches, missedBranches)
+    )
+
+def calculatePercentage(covered, missed):
+    """Calculates the coverage percentage."""
+    if missed == 0 and covered == 0:
+        return 1
+    return covered / (covered + missed)
+
+def main(jacocoCsvFile):
+    coverage, branchCoverage = computeCoverage([jacocoCsvFile])
+    """Return coverage percentage to check against the previous coverage."""
+    return round(coverage * 100, 2)
+
+if __name__ == "__main__":
+    import sys
+    jacocoCsvFile = sys.argv[1]
+    result = main(jacocoCsvFile)
+    print(result)