Add a test for indented function calls (#79)

This change adds a test that verifies that indented function calls
are correctly highlighted. This was fixed as part of the previous
change to make static methods highlight correctly, but this test
will ensure we don’t see any regressions for this particular use case.

Tests/SplashTests/Tests/FunctionCallTests.swift

@@ -130,6 +130,26 @@ final class FunctionCallTests: SyntaxHighlighterTestCase {
         ])
     }
 
+    func testIndentedFunctionCalls() {
+        let components = highlighter.highlight("""
+        variable
+            .callOne()
+            .callTwo()
+        """)
+
+        XCTAssertEqual(components, [
+            .plainText("variable"),
+            .whitespace("\n    "),
+            .plainText("."),
+            .token("callOne", .call),
+            .plainText("()"),
+            .whitespace("\n    "),
+            .plainText("."),
+            .token("callTwo", .call),
+            .plainText("()")
+        ])
+    }
+
     func testXCTAssertCalls() {
         let components = highlighter.highlight("XCTAssertTrue(variable)")
 
@@ -156,6 +176,7 @@ extension FunctionCallTests {
             ("testCallingStaticMethodOnGenericType", testCallingStaticMethodOnGenericType),
             ("testPassingTypeToFunction", testPassingTypeToFunction),
             ("testPassingBoolToUnnamedArgument", testPassingBoolToUnnamedArgument),
+            ("testIndentedFunctionCalls", testIndentedFunctionCalls),
             ("testXCTAssertCalls", testXCTAssertCalls)
         ]
     }