Tests: add unit test for fs.is_file

2 files changed, 38 insertions, 0 deletions

diff --git a/.busted b/.busted
index 8b246f0c..a77c8dae 100644
--- a/.busted
+++ b/.busted
@@ -1,5 +1,7 @@
 return {
    default = {
+      output = "gtest",
+      verbose = true,
       helper = "spec.util.test_env",
       ["auto-insulate"] = false
    }
diff --git a/spec/fs_spec.lua b/spec/fs_spec.lua
index 17ac90ab..a6622f16 100644
--- a/spec/fs_spec.lua
+++ b/spec/fs_spec.lua
@@ -2,6 +2,7 @@ local test_env = require("spec.util.test_env")
 
 test_env.unload_luarocks()
 local fs = require("luarocks.fs")
+local lfs = require("lfs")
 local is_win = test_env.TEST_TARGET_OS == "windows"
 
 describe("Luarocks fs test #whitebox #w_fs", function()
@@ -18,4 +19,39 @@ describe("Luarocks fs test #whitebox #w_fs", function()
          assert.are.same(is_win and [["\\"%" \\\\" \\\\\\"]] or [['\% \\" \\\']], fs.Q([[\% \\" \\\]]))
       end)
    end)
+
+   describe("fs.is_file", function()
+      local tmpfile
+      local tmpdir
+      
+      after_each(function()
+         if tmpfile then
+            os.remove(tmpfile)
+            tmpfile = nil
+         end
+         if tmpdir then
+            lfs.rmdir(tmpdir)
+            tmpdir = nil
+         end
+      end)
+   
+      it("returns true when the argument is a file", function()
+         tmpfile = os.tmpname()
+         local fd = assert(io.open(tmpfile, "w"))
+         fd:write("foo")
+         fd:close()
+         assert.same(true, fs.is_file(tmpfile))
+      end)
+
+      it("returns false when the argument does not exist", function()
+         assert.same(false, fs.is_file("/nonexistent"))
+      end)
+
+      it("returns false when arguments exists but is not a file", function()
+         tmpdir = os.tmpname()
+         os.remove(tmpdir)
+         lfs.mkdir(tmpdir)
+         assert.same(false, fs.is_file("/nonexistent"))
+      end)
+   end)
 end)