Remove tests that checked if specific R packages were installed

repo2docker/buildpacks/r.py

@@ -38,11 +38,7 @@ class RBuildPack(PythonBuildPack):
 
     - are needed by a specific tool
 
-    The `r-base-core` package from Ubuntu or "Ubuntu packages for R"
-    apt repositories is used to install R itself,
-    rather than any of the methods from https://cran.r-project.org/.
-
-    The `r-base-dev` package is installed as advised in RStudio instructions.
+    R is installed from https://docs.rstudio.com/resources/install-r/
     """
 
     @property

tests/unit/test_r.py

@@ -104,50 +104,3 @@ def test_snapshot_mran_date(requested, expected):
         assert r.get_mran_snapshot_url(
             requested
         ) == "https://mran.microsoft.com/snapshot/{}".format(expected.isoformat())
-
-
-def test_install_from_base(tmpdir):
-    # check that for R==3.4 we install from ubuntu
-    tmpdir.chdir()
-
-    with open("runtime.txt", "w") as f:
-        f.write("r-3.4-2019-01-02")
-
-    r = buildpacks.RBuildPack()
-    assert "r-base" in r.get_packages()
-
-
-def test_install_from_cran_apt_repo(tmpdir):
-    # check that for R>3.4 we don't install r-base from Ubuntu
-    tmpdir.chdir()
-
-    with open("runtime.txt", "w") as f:
-        f.write("r-3.5-2019-01-02")
-
-    r = buildpacks.RBuildPack()
-    assert "r-base" not in r.get_packages()
-
-
-def test_custom_cran_apt_repo(tmpdir):
-    tmpdir.chdir()
-
-    with open("runtime.txt", "w") as f:
-        f.write("r-3.5-2019-01-02")
-
-    r = buildpacks.RBuildPack()
-
-    scripts = r.get_build_scripts()
-
-    # check that at least one of the build scripts adds this new apt repository
-    for user, script in scripts:
-        if "https://cloud.r-project.org/bin/linux/ubuntu bionic-cran35/" in script:
-            break
-    else:
-        assert False, "Should have added a new apt repository"
-
-    # check that we install the right package
-    for user, script in scripts:
-        if "r-base-core=3.5" in script:
-            break
-    else:
-        assert False, "Should have installed base R"