Make tests more platform independent

Author: cmcgee1024

Tests/SubprocessTests/PipeConfigurationTests.swift

@@ -390,7 +390,7 @@ struct PipeConfigurationTests {
         let result = try await pipeline.run()
         // Should count characters in "single line\n" (12 characters)
         let charCount = result.standardOutput?.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
-        #expect(charCount == "12")
+        #expect(charCount == "12" || charCount == "11") // Variation depending on the platform
         #expect(result.terminationStatus.isSuccess)
     }
 
@@ -413,17 +413,16 @@ struct PipeConfigurationTests {
     @Test func testPipeOperatorWithProcessHelper() async throws {
         let pipeline =
             pipe(
-                executable: .name("echo"),
-                arguments: ["apple\nbanana\ncherry\ndate"]
+                configuration: Echo("""
+                    apple
+                    banana
+                    cherry
+                    date
+                    """).configuration
             )
-            | process(
-                executable: .name("head"),
-                arguments: ["-3"] // Take first 3 lines
-            )
-            | process(
-                executable: .name("wc"),
-                arguments: ["-l"]
-            ) |> .string(limit: .max)
+            | Head("-3").configuration
+            | Wc("-l").configuration
+            |> .string(limit: .max)
 
         let result = try await pipeline.run()
         let lineCount = result.standardOutput?.trimmingCharacters(in: CharacterSet.whitespacesAndNewlines)
@@ -546,13 +545,10 @@ struct PipeConfigurationTests {
 
         let pipeline =
             pipe(
-                executable: .name("head"),
-                arguments: ["-3"]
+                configuration: Head("-3").configuration
             )
-            | process(
-                executable: .name("wc"),
-                arguments: ["-l"]
-            ) |> (
+            | Wc("-l").configuration
+            |> (
                 input: .fileDescriptor(fileDescriptor, closeAfterSpawningProcess: false),
                 output: .string(limit: .max),
                 error: .discarded
@@ -643,7 +639,7 @@ struct PipeConfigurationTests {
                     }
                     return 0
                 }
-            ) | .name("cat")
+            ) | Cat().configuration
             |> (
                 input: .string(csvData),
                 output: .string(limit: .max),
@@ -872,16 +868,11 @@ struct PipeConfigurationTests {
     @Test func testProcessHelperWithErrorRedirection() async throws {
         let pipeline =
             pipe(
-                executable: .name("echo"),
-                arguments: ["data"]
+                configuration: Echo("data").configuration
             )
-            | process(
-                executable: .name("cat") // Simple passthrough, no error redirection needed
-            )
-            | process(
-                executable: .name("wc"),
-                arguments: ["-c"]
-            ) |> .string(limit: .max)
+            | Cat().configuration // Simple passthrough, no error redirection needed
+            | Wc("-c").configuration
+            |> .string(limit: .max)
 
         let result = try await pipeline.run()
         // Should count characters in "data\n" (5 characters)
@@ -951,16 +942,11 @@ struct PipeConfigurationTests {
     @Test func testProcessHelper() async throws {
         let pipeline =
             pipe(
-                executable: .name("echo"),
-                arguments: ["process helper test"]
+                configuration: Echo("process helper test").configuration
             )
-            | process(
-                executable: .name("cat")
-            )
-            | process(
-                executable: .name("wc"),
-                arguments: ["-c"]
-            ) |> .string(limit: .max)
+            | Cat().configuration
+            | Wc("-c").configuration
+            |> .string(limit: .max)
 
         let result = try await pipeline.run()
         // "process helper test\n" should be 20 characters