feat(plugin-coverage): include decimals in coverage percentage used as audit value

Author: matejchalk

e2e/cli-e2e/tests/__snapshots__/collect.e2e.test.ts.snap

@@ -66,11 +66,11 @@ exports[`CLI collect > should run Code coverage plugin that runs coverage tool a
               },
             ],
           },
-          "displayValue": "56 %",
+          "displayValue": "55.6 %",
           "score": 0.5556,
           "slug": "function-coverage",
           "title": "Function coverage",
-          "value": 56,
+          "value": 55.55555555555556,
         },
         {
           "description": "Measures how many branches were executed after conditional statements in at least one test.",
@@ -88,11 +88,11 @@ exports[`CLI collect > should run Code coverage plugin that runs coverage tool a
               },
             ],
           },
-          "displayValue": "88 %",
+          "displayValue": "87.5 %",
           "score": 0.875,
           "slug": "branch-coverage",
           "title": "Branch coverage",
-          "value": 88,
+          "value": 87.5,
         },
         {
           "description": "Measures how many lines of code were executed in at least one test.",
@@ -210,11 +210,11 @@ exports[`CLI collect > should run Code coverage plugin that runs coverage tool a
               },
             ],
           },
-          "displayValue": "62 %",
+          "displayValue": "62.1 %",
           "score": 0.6211,
           "slug": "line-coverage",
           "title": "Line coverage",
-          "value": 62,
+          "value": 62.10526315789474,
         },
       ],
       "description": "Official Code PushUp code coverage plugin.",
@@ -347,11 +347,11 @@ exports[`CLI collect > should run Code coverage plugin which collects passed res
               },
             ],
           },
-          "displayValue": "76 %",
+          "displayValue": "76.5 %",
           "score": 0.7647,
           "slug": "branch-coverage",
           "title": "Branch coverage",
-          "value": 76,
+          "value": 76.47058823529412,
         },
         {
           "description": "Measures how many lines of code were executed in at least one test.",

packages/plugin-coverage/src/lib/runner/lcov/transform.ts

@@ -130,13 +130,13 @@ export function lcovCoverageToAuditOutput(
 ): AuditOutput {
   const coverage = calculateCoverage(stat.totalHit, stat.totalFound);
   const MAX_DECIMAL_PLACES = 4;
-  const roundedIntValue = toNumberPrecision(coverage * 100, 0);
+  const coveragePercentage = coverage * 100;
 
   return {
     slug: `${coverageType}-coverage`,
     score: toNumberPrecision(coverage, MAX_DECIMAL_PLACES),
-    value: roundedIntValue,
-    displayValue: `${roundedIntValue} %`,
+    value: coveragePercentage,
+    displayValue: `${toNumberPrecision(coveragePercentage, 1)} %`,
     details: {
       issues: stat.issues,
     },