http: header with map (#731)

Author: MykolaGolubyev

webtau-http/src/main/java/org/testingisdocumenting/webtau/http/HttpHeader.java

@@ -93,13 +93,31 @@ public void add(String key, String value) {
         header.put(key, value);
     }
 
+    /**
+     * Creates a new header from the current one with an additional key-value
+     * @param key additional key
+     * @param value additional value
+     * @return new header
+     */
     public HttpHeader with(String key, CharSequence value) {
         Map<String, CharSequence> copy = new LinkedHashMap<>(this.header);
         copy.put(key, value);
 
         return new HttpHeader(copy);
     }
 
+    /**
+     * Creates a new header from the current one with an additional key values
+     * @param additionalValues additional values
+     * @return new header
+     */
+    public HttpHeader with(Map<String, CharSequence> additionalValues) {
+        Map<String, CharSequence> copy = new LinkedHashMap<>(this.header);
+        copy.putAll(additionalValues);
+
+        return new HttpHeader(copy);
+    }
+
     public HttpHeader redactSecrets() {
         Map<String, CharSequence> redacted = new LinkedHashMap<>();
         for (Map.Entry<String, CharSequence> entry : header.entrySet()) {

webtau-http/src/test/groovy/org/testingisdocumenting/webtau/http/HttpHeaderTest.groovy

@@ -1,4 +1,5 @@
 /*
+ * Copyright 2020 webtau maintainers
  * Copyright 2019 TWO SIGMA OPEN SOURCE, LLC
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -88,4 +89,18 @@ class HttpHeaderTest {
         def newHeader = header.with('foo', 'bar')
         newHeader.should == new HttpHeader(['foo': 'bar'])
     }
+
+    @Test
+    void "build from existing header with a single new value"() {
+        def header = new HttpHeader([k: 'v'])
+        def newHeader = header.with('foo', 'bar')
+        newHeader.should == new HttpHeader([k: 'v', 'foo': 'bar'])
+    }
+
+    @Test
+    void "build from existing header with a new map"() {
+        def header = new HttpHeader([k: 'v'])
+        def newHeader = header.with([k1: 'v1', k2: 'v2'])
+        newHeader.should == new HttpHeader([k: 'v', k1: 'v1', k2: 'v2'])
+    }
 }