Code coverage.

.github/workflows/go.yml

@@ -31,6 +31,9 @@ jobs:
       run: go build -v ./...
 
     - name: Go test
-      run: go test -v ./...
-
-
+      run: go test -v -coverprofile=coverage.out ./...
+
+    - name: Go coverage
+      env:
+        CODE_COVERAGE_THRESHOLD: 100
+      run: bash ./scripts/coverage.sh

scripts/coverage.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+COVERAGE_FILE=coverage.out
+
+if [ -z "$CODE_COVERAGE_THRESHOLD" ]
+then
+  echo "No code coverage threshold is set."
+  exit 0
+fi
+
+echo "Code coverage threshold ${CODE_COVERAGE_THRESHOLD}%"
+
+if [ ! -e "$COVERAGE_FILE" ]
+then
+  echo "Coverage file ${COVERAGE_FILE} is not found."
+  exit 1
+fi
+
+CODE_COVERAGE=$(go tool cover -func=coverage.out | grep "total:" | grep -E -o '[0-9]+\.[0-9]+')
+
+if awk "BEGIN { exit !($CODE_COVERAGE < $CODE_COVERAGE_THRESHOLD)}"
+then
+  echo "Current code coverage ${CODE_COVERAGE}% is below the ${CODE_COVERAGE_THRESHOLD}% threshold."
+  exit 1
+fi