Adds "should be able to install a special version" (#1413)

* Adds "should be able to install a special version"

* Removes unused import

Author: jmgomez

tests/gitversions/gitversions.nimble

@@ -0,0 +1,12 @@
+# Package
+
+version       = "0.1.0"
+author        = "jmgomez"
+description   = "A new awesome nimble package"
+license       = "MIT"
+srcDir        = "src"
+
+
+# Dependencies
+
+requires "nim"

tests/gitversions/src/gitversions.nim

@@ -0,0 +1,7 @@
+# This is just an example to get you started. A typical library package
+# exports the main API in this file. Note that you cannot rename this file
+# but you can remove it if you wish.
+
+proc add*(x, y: int): int =
+  ## Adds two numbers together.
+  return x + y

tests/gitversions/src/gitversions/submodule.nim

@@ -0,0 +1,12 @@
+# This is just an example to get you started. Users of your library will
+# import this file by writing ``import gitversions/submodule``. Feel free to rename or
+# remove this file altogether. You may create additional modules alongside
+# this file as required.
+
+type
+  Submodule* = object
+    name*: string
+
+proc initSubmodule*(): Submodule =
+  ## Initialises a new ``Submodule`` object.
+  Submodule(name: "Anonymous")

tests/gitversions/tests/test1.nim

@@ -0,0 +1,12 @@
+# This is just an example to get you started. You may wish to put all of your
+# tests into a single file, or separate them into multiple `test1`, `test2`
+# etc. files (better names are recommended, just make sure the name starts with
+# the letter 't').
+#
+# To run these tests, simply execute `nimble test`.
+
+import unittest
+
+import gitversions
+test "can add":
+  check add(5, 5) == 10

tests/trequireflag.nim

@@ -1,5 +1,5 @@
 {.used.}
-import unittest, os#, strformat, osproc
+import unittest, os, strutils# strformat, osproc
 import testscommon
 from nimblepkg/common import cd
 
@@ -35,3 +35,38 @@ suite "requires flag":
   #     check output.processOutput.inLines("Installing [email protected]")
 
 
+
+  test "should be able to install a special version":
+  #[
+    Test it can install a dep with the following variations:
+      - https://github.com/status-im/nim-json-serialization.git#lean-arrays
+      - https://github.com/status-im/nim-json-serialization.git#4cd31594f868a3d3cb81ec9d5f479efbe2466ebd
+      - json_serialization#lean-arrays
+      - json_serialization#4cd31594f868a3d3cb81ec9d5f479efbe2466ebd
+  ]#
+    let requires = [
+      "https://github.com/status-im/nim-json-serialization.git#nimble_test_dont_delete",
+      "https://github.com/status-im/nim-json-serialization.git#e45fe67d71f006f15a32f90a5a56a4775982d951",
+      "json_serialization#nimble_test_dont_delete",
+      "json_serialization#e45fe67d71f006f15a32f90a5a56a4775982d951",
+      "json_serialization == 0.2.9"
+    ]
+    cleanDir(installDir)
+    cd "gitversions":
+      for req in requires:
+        let require = "--requires: " & req
+        let isVersion = req.contains("==")
+        # echo "Trying require: ", req
+        let (output, exitCode) = execNimble("install", require)
+        let pkgDir = getPackageDir(pkgsDir, "json_serialization-0.2.9")
+        check exitCode == QuitSuccess
+        let nimbleTestDontDeleteFile =  pkgDir / "json_serialization" / "nimble.test.nim"
+        # echo "Nimble test dont delete file: ", nimbleTestDontDeleteFile
+        if isVersion:
+          check output.processOutput.inLines("Success:  json_serialization installed successfully.")
+          check not fileExists(nimbleTestDontDeleteFile)
+        else:
+          check output.processOutput.inLines("Success:  json_serialization installed successfully.")
+          check fileExists(nimbleTestDontDeleteFile)
+        cleanDir(pkgDir) #Resets the package dir for each require
+