Add tests for ggplot2 theme colors

tests/testthat/test-ggplot2.R

+# test_that()
+
+describe("theme_xaringan()", {
+
+  it("errors if no css file or style_xaringan theme called", {
+    expect_error(
+      with_clean_session(function() {
+        xaringanthemer::theme_xaringan()
+      })
+    )
+  })
+
+  it("returns a theme using the style_xaringan colors", {
+    theme <- with_clean_session(function() {
+      xaringanthemer::style_xaringan(
+        text_color = "#000001",
+        background_color = "#000002",
+        header_color = "#000003",
+        text_bold_color = "#000004",
+        text_font_family = "Damogran",
+        text_font_google = NULL,
+        header_font_family = "Magrathea",
+        header_font_google = NULL
+      )
+      xaringanthemer::theme_xaringan(
+        text_font_use_google = FALSE,
+        title_font_use_google = FALSE
+      )
+    })
+
+    expect_equal(theme$text$family, "Damogran")
+    expect_equal(theme$title$family, "Magrathea")
+    expect_equal(theme$title$colour, "#000003")
+    expect_equal(theme$plot.background$colour, "#000002")
+    expect_equal(theme$plot.background$fill, "#000002")
+  })
+
+  it("returns correct theme reading from a css file", {
+    css <- xaringanthemer::style_xaringan(
+      text_color = "#000001",
+      background_color = "#000002",
+      header_color = "#000003",
+      text_bold_color = "#000004",
+      text_font_family = "Damogran",
+      text_font_google = NULL,
+      header_font_family = "Magrathea",
+      header_font_google = NULL,
+      outfile = NULL
+    )
+
+    theme <- with_clean_session(function(css) {
+      writeLines(css, "xaringan-themer.css")
+      xaringanthemer::theme_xaringan(
+        text_font_use_google = FALSE,
+        title_font_use_google = FALSE
+      )
+    }, list(css = css))
+
+    expect_equal(theme$text$family, "Damogran")
+    expect_equal(theme$title$family, "Magrathea")
+    expect_equal(theme$title$colour, "#000003")
+    expect_equal(theme$plot.background$colour, "#000002")
+    expect_equal(theme$plot.background$fill, "#000002")
+  })
+
+  it("works with 3-digit hex colors", {
+    theme <- with_clean_session(function() {
+      xaringanthemer::style_xaringan(
+        text_color = "#001",
+        background_color = "#002",
+        header_color = "#003",
+        text_bold_color = "#004"
+      )
+      xaringanthemer::theme_xaringan(
+        text_font_use_google = FALSE,
+        title_font_use_google = FALSE
+      )
+    })
+
+    expect_equal(theme$title$colour, "#000033")
+    expect_equal(theme$plot.background$colour, "#000022")
+    expect_equal(theme$plot.background$fill, "#000022")
+  })
+})
+
+describe("theme_xaringan_inverse()", {
+
+  it("errors if no css file or style_xaringan theme called", {
+    expect_error(
+      with_clean_session(function() {
+        xaringanthemer::theme_xaringan_inverse()
+      })
+    )
+  })
+
+  it("returns a theme using the style_xaringan colors", {
+    theme <- with_clean_session(function() {
+      xaringanthemer::style_xaringan(
+        text_color = "#000001",
+        inverse_text_color = "#100000",
+        background_color = "#000002",
+        inverse_background_color = "#200000",
+        header_color = "#000003",
+        inverse_header_color = "#300000",
+        text_bold_color = "#000004",
+        text_font_family = "Damogran",
+        text_font_google = NULL,
+        header_font_family = "Magrathea",
+        header_font_google = NULL
+      )
+      xaringanthemer::theme_xaringan_inverse(
+        text_font_use_google = FALSE,
+        title_font_use_google = FALSE
+      )
+    })
+
+    expect_equal(theme$text$family, "Damogran")
+    expect_equal(theme$title$family, "Magrathea")
+    expect_equal(theme$title$colour, "#300000")
+    expect_equal(theme$plot.background$colour, "#200000")
+    expect_equal(theme$plot.background$fill, "#200000")
+  })
+
+  it("returns correct colors pulling from css file", {
+    css <- xaringanthemer::style_xaringan(
+      text_color = "#000001",
+      inverse_text_color = "#100000",
+      background_color = "#000002",
+      inverse_background_color = "#200000",
+      header_color = "#000003",
+      inverse_header_color = "#300000",
+      text_bold_color = "#000004",
+      text_font_family = "Damogran",
+      text_font_google = NULL,
+      header_font_family = "Magrathea",
+      header_font_google = NULL,
+      outfile = NULL
+    )
+    theme <- with_clean_session(function(css) {
+      writeLines(css, "basic.css")
+      xaringanthemer::theme_xaringan_inverse(
+        text_font_use_google = FALSE,
+        title_font_use_google = FALSE
+      )
+    }, list(css = css))
+
+    expect_equal(theme$text$family, "Damogran")
+    expect_equal(theme$title$family, "Magrathea")
+    expect_equal(theme$title$colour, "#300000")
+    expect_equal(theme$plot.background$colour, "#200000")
+    expect_equal(theme$plot.background$fill, "#200000")
+  })
+
+  it("works with 3-digit hex colors", {
+    theme <- with_clean_session(function() {
+      xaringanthemer::style_xaringan(
+        text_color = "#001",
+        background_color = "#002",
+        header_color = "#003",
+        inverse_text_color = "#100",
+        inverse_background_color = "#200",
+        inverse_header_color = "#300",
+        text_bold_color = "#004"
+      )
+      xaringanthemer::theme_xaringan_inverse(
+        text_font_use_google = FALSE,
+        title_font_use_google = FALSE
+      )
+    })
+
+    expect_equal(theme$title$colour, "#330000")
+    expect_equal(theme$plot.background$colour, "#220000")
+    expect_equal(theme$plot.background$fill, "#220000")
+  })
+})