allow tests to delegate choosing which ranges to query to the helpers

tests/path_gateway_dag_test.go

@@ -252,10 +252,7 @@ func TestPlainCodec(t *testing.T) {
 								Contains(Fmt("application/{{format}}", row.Format)),
 						),
 				},
-				helpers.ByteRanges{
-					helpers.SimpleByteRange(0, 5),
-					helpers.SimpleByteRange(10, 15),
-				},
+				nil,
 				plain.RawData(),
 			)...).
 			Append(
@@ -276,10 +273,7 @@ func TestPlainCodec(t *testing.T) {
 									Contains("application/{{format}}", row.Format),
 							),
 					},
-					helpers.ByteRanges{
-						helpers.SimpleByteRange(0, 5),
-						helpers.SimpleByteRange(10, 15),
-					},
+					nil,
 					plain.RawData(),
 				)...).
 			Append(
@@ -302,10 +296,7 @@ func TestPlainCodec(t *testing.T) {
 									Contains("application/{{format}}", row.Format),
 							),
 					},
-					helpers.ByteRanges{
-						helpers.SimpleByteRange(0, 5),
-						helpers.SimpleByteRange(10, 15),
-					},
+					nil,
 					plain.RawData(),
 				)...).
 			Append(
@@ -359,10 +350,7 @@ func TestPlainCodec(t *testing.T) {
 								Contains("application/vnd.ipld.dag-{{format}}", row.Format),
 						),
 				},
-				helpers.ByteRanges{
-					helpers.SimpleByteRange(0, 5),
-					helpers.SimpleByteRange(10, 15),
-				},
+				nil,
 				dagFormattedResponse,
 			)
 			RunWithSpecs(t, rangeTests, specs.PathGatewayDAG)
@@ -642,11 +630,7 @@ func TestNativeDag(t *testing.T) {
 					Headers(
 						Header("Content-Type", "application/vnd.ipld.dag-{{format}}", row.Format),
 					),
-			},
-			helpers.ByteRanges{
-				helpers.SimpleByteRange(6, 16),
-				helpers.SimpleByteRange(20, 25),
-			},
+			}, nil,
 			dagTraversal.RawData(),
 		)...).Append(
 			helpers.RangeTestTransform(t,
@@ -662,10 +646,7 @@ func TestNativeDag(t *testing.T) {
 							Header("Content-Type", "application/vnd.ipld.dag-{{format}}", row.Format),
 						),
 				},
-				helpers.ByteRanges{
-					helpers.SimpleByteRange(6, 16),
-					helpers.SimpleByteRange(20, 25),
-				}, dagTraversal.RawData(),
+				nil, dagTraversal.RawData(),
 			)...).Append(
 			helpers.RangeTestTransform(t,
 				SugarTest{
@@ -680,10 +661,7 @@ func TestNativeDag(t *testing.T) {
 							Header("Content-Type", "application/{{format}}", row.Format),
 						),
 				},
-				helpers.ByteRanges{
-					helpers.SimpleByteRange(6, 16),
-					helpers.SimpleByteRange(20, 25),
-				},
+				nil,
 				dagTraversal.RawData(),
 			)...)
 
@@ -726,9 +704,7 @@ func TestNativeDag(t *testing.T) {
 					),
 				Response: Expect(),
 			},
-			helpers.ByteRanges{
-				helpers.SimpleByteRange(1, 5),
-				helpers.SimpleByteRange(93, 104)},
+			nil,
 			dagJsonConvertedData)
 
 		RunWithSpecs(t, rangeTests, specs.PathGatewayDAG)
@@ -766,9 +742,7 @@ func TestNativeDag(t *testing.T) {
 						Header("Accept", "text/html"),
 					),
 				Response: Expect(),
-			}, helpers.ByteRanges{
-				helpers.SimpleByteRange(1, 5),
-				helpers.SimpleByteRange(93, 104)},
+			}, nil,
 			dagCborHTMLRendering)
 
 		RunWithSpecs(t, rangeTests, specs.PathGatewayDAG)

tests/trustless_gateway_raw_test.go

@@ -150,10 +150,7 @@ func TestTrustlessRawRanges(t *testing.T) {
 				),
 			Response: Expect(),
 		},
-		helpers.ByteRanges{
-			helpers.SimpleByteRange(6, 16),
-			helpers.SimpleByteRange(0, 4),
-		},
+		nil,
 		fixture.MustGetRawData("dir", "ascii.txt"))
 
 	RunWithSpecs(t, tests, specs.TrustlessGatewayRaw)

tooling/helpers/range.go

@@ -178,6 +178,9 @@ func MultiRangeTestTransform(t *testing.T, testWithoutRangeRequestHeader test.Su
 // Will test the full request, a single range request for the first passed range as well as a multi-range request for
 // all the requested ranges.
 //
+// If no ranges are passed then some non-overlapping ranges are automatically generated for data >= 10 bytes. Smaller
+// data will result in undefined behavior.
+//
 // Note: HTTP Range requests can be validly responded with either the full data, or the requested partial data
 // Note: HTTP Multi Range requests can be validly responded with one of the full data, the partial data from the first
 // range, or the partial data from all the requested ranges
@@ -202,10 +205,25 @@ func BaseWithRangeTestTransform(t *testing.T, baseTest test.SugarTest, branges B
 // Will test both a single range request for the first passed range as well as a multi-range request for all the
 // requested ranges.
 //
+// If no ranges are passed then some non-overlapping ranges are automatically generated for data >= 10 bytes. Smaller
+// data will result in undefined behavior.
+//
 // Note: HTTP Range requests can be validly responded with either the full data, or the requested partial data
 // Note: HTTP Multi Range requests can be validly responded with one of the full data, the partial data from the first
 // range, or the partial data from all the requested ranges
 func RangeTestTransform(t *testing.T, baseTest test.SugarTest, branges ByteRanges, fullData []byte) test.SugarTests {
+	if len(branges) == 0 {
+		dataLen := len(fullData)
+		if dataLen < 10 {
+			panic("transformation not defined for data smaller than 10 bytes")
+		}
+
+		branges = ByteRanges{
+			SimpleByteRange(7, 9),
+			SimpleByteRange(1, 3),
+		}
+	}
+
 	singleBase := test.SugarTest{
 		Name:      fmt.Sprintf("%s - single range", baseTest.Name),
 		Hint:      baseTest.Hint,