Add getheader test

tests/getheader.nims

@@ -0,0 +1,42 @@
+import strutils
+
+proc testCall(cmd, output: string, exitCode: int, delete = true) =
+  if delete:
+    rmDir("build/liblzma")
+  echo cmd
+  var
+    ccmd =
+      when defined(windows):
+        "cmd /c " & cmd
+      else:
+        cmd
+    (outp, exitC) = gorgeEx(ccmd)
+  echo outp
+  doAssert exitC == exitCode, $exitC
+  doAssert outp.contains(output), outp
+
+var
+  cmd = "nim c -f"
+  rcmd = " -r lzma.nim"
+  exp = "liblzma version = "
+
+when defined(linux):
+  testCall(cmd & rcmd, "No build files found", 1)
+
+  # stdlib
+  testCall(cmd & " -d:lzmaStd" & rcmd, exp, 0)
+  testCall(cmd & " -d:lzmaStd -d:lzmaStatic" & rcmd, exp, 0)
+
+  # git
+  testCall(cmd & " -d:lzmaGit" & rcmd, exp, 0)
+  testCall(cmd & " -d:lzmaGit -d:lzmaStatic" & rcmd, exp, 0, delete = false)
+
+  # git tag
+  testCall(cmd & " -d:lzmaGit -d:lzmaVersion=v5.2.0" & rcmd, exp & "5.2.0", 0)
+  testCall(cmd & " -d:lzmaGit -d:lzmaStatic -d:lzmaVersion=v5.2.0" & rcmd, exp & "5.2.0", 0, delete = false)
+  testCall("cd build/liblzma && git branch", "v5.2.0", 0, delete = false)
+
+  # dl
+  testCall(cmd & " -d:lzmaDL" & rcmd, "Need version", 1)
+  testCall(cmd & " -d:lzmaDL -d:lzmaVersion=v5.2.4" & rcmd, exp & "5.2.4", 0)
+  testCall(cmd & " -d:lzmaDL -d:lzmaStatic -d:lzmaVersion=v5.2.4" & rcmd, exp & "5.2.4", 0, delete = false)