.

qwen/nodejs/node_modules/istanbul-lib-coverage/lib/coverage-summary.js

@@ -0,0 +1,112 @@
+/*
+ Copyright 2012-2015, Yahoo Inc.
+ Copyrights licensed under the New BSD License. See the accompanying LICENSE file for terms.
+ */
+'use strict';
+
+const percent = require('./percent');
+const dataProperties = require('./data-properties');
+
+function blankSummary() {
+    const empty = () => ({
+        total: 0,
+        covered: 0,
+        skipped: 0,
+        pct: 'Unknown'
+    });
+
+    return {
+        lines: empty(),
+        statements: empty(),
+        functions: empty(),
+        branches: empty(),
+        branchesTrue: empty()
+    };
+}
+
+// asserts that a data object "looks like" a summary coverage object
+function assertValidSummary(obj) {
+    const valid =
+        obj && obj.lines && obj.statements && obj.functions && obj.branches;
+    if (!valid) {
+        throw new Error(
+            'Invalid summary coverage object, missing keys, found:' +
+                Object.keys(obj).join(',')
+        );
+    }
+}
+
+/**
+ * CoverageSummary provides a summary of code coverage . It exposes 4 properties,
+ * `lines`, `statements`, `branches`, and `functions`. Each of these properties
+ * is an object that has 4 keys `total`, `covered`, `skipped` and `pct`.
+ * `pct` is a percentage number (0-100).
+ */
+class CoverageSummary {
+    /**
+     * @constructor
+     * @param {Object|CoverageSummary} [obj=undefined] an optional data object or
+     * another coverage summary to initialize this object with.
+     */
+    constructor(obj) {
+        if (!obj) {
+            this.data = blankSummary();
+        } else if (obj instanceof CoverageSummary) {
+            this.data = obj.data;
+        } else {
+            this.data = obj;
+        }
+        assertValidSummary(this.data);
+    }
+
+    /**
+     * merges a second summary coverage object into this one
+     * @param {CoverageSummary} obj - another coverage summary object
+     */
+    merge(obj) {
+        const keys = [
+            'lines',
+            'statements',
+            'branches',
+            'functions',
+            'branchesTrue'
+        ];
+        keys.forEach(key => {
+            if (obj[key]) {
+                this[key].total += obj[key].total;
+                this[key].covered += obj[key].covered;
+                this[key].skipped += obj[key].skipped;
+                this[key].pct = percent(this[key].covered, this[key].total);
+            }
+        });
+
+        return this;
+    }
+
+    /**
+     * returns a POJO that is JSON serializable. May be used to get the raw
+     * summary object.
+     */
+    toJSON() {
+        return this.data;
+    }
+
+    /**
+     * return true if summary has no lines of code
+     */
+    isEmpty() {
+        return this.lines.total === 0;
+    }
+}
+
+dataProperties(CoverageSummary, [
+    'lines',
+    'statements',
+    'functions',
+    'branches',
+    'branchesTrue'
+]);
+
+module.exports = {
+    CoverageSummary
+};