4 files changed, 40 insertions, 16 deletions
diff --git a/test/dictionary-validate.js b/test/dictionary-validate.js
index dca3bcf5..082f0aea 100644
--- a/test/dictionary-validate.js
+++ b/test/dictionary-validate.js
@@ -1,13 +1,9 @@
 const fs = require('fs');
 const path = require('path');
+const yomichanTest = require('./yomichan-test');
 
-process.noDeprecation = true; // Suppress a warning about JSZip
-const JSZip = require(path.join(__dirname, '../ext/mixed/lib/jszip.min.js'));
-process.noDeprecation = false;
-
-const jsonSchemaFileName = path.join(__dirname, '../ext/bg/js/json-schema.js');
-const jsonSchemaFileSource = fs.readFileSync(jsonSchemaFileName, {encoding: 'utf8'});
-const JsonSchema = Function(`'use strict';${jsonSchemaFileSource};return JsonSchema;`)();
+const JSZip = yomichanTest.JSZip;
+const {JsonSchema} = yomichanTest.requireScript('ext/bg/js/json-schema.js', ['JsonSchema']);
 
 
 function readSchema(relativeFileName) {
diff --git a/test/schema-validate.js b/test/schema-validate.js
index 309adf83..1271a611 100644
--- a/test/schema-validate.js
+++ b/test/schema-validate.js
@@ -1,9 +1,7 @@
 const fs = require('fs');
-const path = require('path');
+const yomichanTest = require('./yomichan-test');
 
-const jsonSchemaFileName = path.join(__dirname, '../ext/bg/js/json-schema.js');
-const jsonSchemaFileSource = fs.readFileSync(jsonSchemaFileName, {encoding: 'utf8'});
-const JsonSchema = Function(`'use strict';${jsonSchemaFileSource};return JsonSchema;`)();
+const {JsonSchema} = yomichanTest.requireScript('ext/bg/js/json-schema.js', ['JsonSchema']);
 
 
 function main() {
diff --git a/test/test-schema.js b/test/test-schema.js
index 762b8509..ca4f56dd 100644
--- a/test/test-schema.js
+++ b/test/test-schema.js
@@ -1,10 +1,7 @@
-const fs = require('fs');
-const path = require('path');
 const assert = require('assert');
+const yomichanTest = require('./yomichan-test');
 
-const jsonSchemaFileName = path.join(__dirname, '../ext/bg/js/json-schema.js');
-const jsonSchemaFileSource = fs.readFileSync(jsonSchemaFileName, {encoding: 'utf8'});
-const JsonSchema = Function(`'use strict';${jsonSchemaFileSource};return JsonSchema;`)();
+const {JsonSchema} = yomichanTest.requireScript('ext/bg/js/json-schema.js', ['JsonSchema']);
 
 
 function testValidate1() {
diff --git a/test/yomichan-test.js b/test/yomichan-test.js
new file mode 100644
index 00000000..602b8d78
--- /dev/null
+++ b/test/yomichan-test.js
@@ -0,0 +1,33 @@
+const fs = require('fs');
+const path = require('path');
+
+
+let JSZip = null;
+
+function requireScript(fileName, exportNames, variables) {
+    const absoluteFileName = path.join(__dirname, '..', fileName);
+    const source = fs.readFileSync(absoluteFileName, {encoding: 'utf8'});
+    const exportNamesString = Array.isArray(exportNames) ? exportNames.join(',') : '';
+    const variablesArgumentName = '__variables__';
+    let variableString = '';
+    if (typeof variables === 'object' && variables !== null) {
+        variableString = Object.keys(variables).join(',');
+        variableString = `const {${variableString}} = ${variablesArgumentName};`;
+    }
+    return Function(variablesArgumentName, `'use strict';${variableString}${source}\n;return {${exportNamesString}};`)(variables);
+}
+
+function getJSZip() {
+    if (JSZip === null) {
+        process.noDeprecation = true; // Suppress a warning about JSZip
+        JSZip = require(path.join(__dirname, '../ext/mixed/lib/jszip.min.js'));
+        process.noDeprecation = false;
+    }
+    return JSZip;
+}
+
+
+module.exports = {
+    requireScript,
+    get JSZip() { return getJSZip(); }
+};