Use a smaller R library in our tests

ggplot2 is a big library with a bunch of dependencies,
making our already slow R tests even slower. This PR
switches them to using the tinytest library, which has
no dependencies and is much smaller.

Author: yuvipanda

tests/conda/r3.6/environment.yml

@@ -1,3 +1,3 @@
 dependencies:
   - r-base=3.6
-  - r-ggplot2
+  - r-tinytest

tests/conda/r3.6/verify

@@ -2,6 +2,6 @@
 
 jupyter serverextension list 2>&1 | grep jupyter_server_proxy
 jupyter nbextension list 2>&1 | grep jupyter_server_proxy
-R -e "library('ggplot2')"
+R -e "library('tinytest')"
 # Fail if version is not 3.6
-R -e 'if (!(version$major == "3" && as.double(version$minor) >= 6 && as.double(version$minor) < 7)) quit("yes", 1)'
+R -e 'if (!(version$major == "3" && as.double(version$minor) >= 6 && as.double(version$minor) < 7)) quit("yes", 1)'

tests/r/mran/install.R

@@ -1 +1 @@
-install.packages("ggplot2")
+install.packages("tinytest")

tests/r/mran/verify

@@ -1,5 +1,5 @@
 #!/usr/bin/env Rscript
-library('ggplot2')
+library('tinytest')
 
 print(version)
 

tests/r/r3.6/install.R

@@ -1 +1 @@
-install.packages("ggplot2")
+install.packages("tinytest")

tests/r/r3.6/verify

@@ -1,5 +1,5 @@
 #!/usr/bin/env Rscript
-library('ggplot2')
+library('tinytest')
 
 print(version)
 # Fail if version is not 3.6

tests/r/r4.0-rspm/install.R

@@ -1 +1 @@
-install.packages("ggplot2")
+install.packages("tinytest")

tests/r/r4.0-rspm/verify

@@ -1,5 +1,5 @@
 #!/usr/bin/env Rscript
-library('ggplot2')
+library('tinytest')
 
 print(version)
 # Fail if version is not 4.0

tests/r/r4.0/install.R

@@ -1 +1 @@
-install.packages("ggplot2")
+install.packages("tinytest")

tests/r/r4.0/verify

@@ -1,5 +1,5 @@
 #!/usr/bin/env Rscript
-library('ggplot2')
+library('tinytest')
 
 print(version)
 # Fail if version is not 4.0